Residents of the troglodyte village of Trôo, France, are using stone-carved cave homes to stay cool during extreme heatwaves.
These dwellings provide a sustainable alternative to air conditioning as climate-driven temperature spikes become more frequent across the country. While millions in France are grappling with scorching heat [1], the unique geology of Trôo offers a low-energy solution for those living within the rock.
The homes in Trôo function as natural refrigerators, maintaining a stable, cool temperature year-round. This thermal mass prevents the interior spaces from reaching the dangerous highs seen in traditional surface buildings. By relying on the earth's natural insulation, residents avoid the high energy costs and carbon emissions associated with mechanical cooling systems.
Jean-Luc Eclercy-Deterpigny, a resident of the village, said the advantage of living in such an environment. "We are privileged," he said [2].
Trôo is one of several troglodyte settlements in the region, where homes are carved directly into the cliffs. This architectural style creates a permanent shield against the sun, a feature that is becoming increasingly valuable as summer temperatures continue to rise. The village serves as a living example of how ancient building techniques can address modern environmental challenges.
Local residents continue to utilize these spaces as a primary defense against the heat. The natural cooling effect is consistent, ensuring that the interior remains habitable without the need for electricity-heavy appliances that often strain the power grid during peak summer months.
“The cave homes in Trôo stay naturally cool year-round.”
The reliance on troglodyte architecture in Trôo highlights a growing interest in passive cooling strategies to combat climate change. As heatwaves increase in frequency and intensity, these traditional building methods offer a blueprint for reducing energy dependency and urban heat island effects by utilizing the earth's natural thermal properties.
